What does HRESULT 0x8898009E (MILERR_ADAPTER_NOT_FOUND) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: The requested graphics adapter could not be found by the Desktop Window Manager.

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MILERR_DXGI_ENUMERATION_OUT_OF_SYNC	MILERR_COLORSPACE_NOT_SUPPORTED

MILERR_ADAPTER_NOT_FOUND

MILERR_ADAPTER_NOT_FOUND is a Windows Media Integration Layer (MIL) HRESULT. It indicates that the adapter identified by the requested locally unique identifier is not currently available to the composition path.

What to check

Re-enumerate graphics adapters and refresh the LUID after a driver reset, GPU switch, or display change.
Check hybrid-GPU selection and remote-session conditions that can change the active adapter.
Do not retain adapter references across device-loss recovery without validating that they remain current.

Microsoft documentation about WPF hardware-accelerated rendering

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